Fig. 5, Fig. 6, Fig. 7 – Johnson Level & Tool Mfg. 40-6660 User Manual

Page 9: Fig. 8

6. Adjust the screws on the three legs of

the base to center the top bubble, which
will achieve the higher accuracy (Fig. 5).

Power-Off

Set the locking knob to LOCK position, and
the instrument is powered off (Fig. 6).

Note: The locking knob must be set to LOCK position when the user
needs to move the instrument or packed into the case. If the alarms
sounds when you move the unit, it means the locking screw is not
locked. Please make sure to lock it.

Center Position Adjusting

Push the locking staff leftwards, and then
the instrument can be moved to different
directions freely in order to have plumb-down
laser point accurately coincide with the
reference mark on floor. Push the locking staff
rightwards, and then you can't move the instrument any more (Fig. 7).

Laser Output Position Adjusting

Rotate the instrument to the desired position,
and then adjust the two fine adjusting screws
for precise angle adjustment (Fig. 8).

Screw

Bubble
Centering

Fig. 5

Locking Position

Fig. 6

Unlocking

Locking

Locking Staff

Fig. 7

Fine
Adjusting
Screw

Fig. 8